Hi all,

I can you only encourage to add such a sail to your boat. From my expierence I can tell you you will love it. I have a hooter of about 14m² (stated in the manual, but I have never measured), not very flat and certainly not applicable to the mid girth rule.
In these light wind conditions (below 8kts) you can still have fun (e.g. sailing on one hull) and you can point surprisingly high. I really run circles around the T of my friend than. As soon as the wind gets stronger, you can't point anymore, independent how flat the sail is, because the sheet loads are too high (at least for me) and the heeling moment is too strong. Hence I think the most important parameter to look for is sail area. Ones this is fixed, you can think about curvature etc.
My hooter is cross-cut from light dacron, so it keeps about the shape if you point. The sail can be trimmed by its halyard (coarse) and the main sheet (fine). Because it furles, the shape is certainly not perfect for pointing (some crinkles, if the wind is light), but trimming changes the speed by 1% and concentrating on flying one hull and sheeting by 20%.
If the wind is stronger it behaves exactly like a spinnaker, however, boats with bigger spi can sail deeper at same speed at here trim and shape seem to be more important.

In one sentance: No more boring light wind days.

Cheers,

Klaus